A
slippery slope is the perceived danger of a "bad" behavior or situation easily degrading into an even worse behavior or situation, resulting in a downward spiral.
Declaring that something leads to a
slippery slope is a common tactic in fearmongering.
Following this definition, a "slippery-slope
slippery slope" is a situation in which people accept baseless slippery-slope arguments too readily. This leads to the inevitable acceptance of dangerously ridiculous slippery-slope arguments.
"...but once you give a pass to seemingly
reasonable evidence-free slippery-slope arguments, you end up with people arguing that state-subsidised health insurance leads to death panels. It's a slippery-slope
slippery slope!"
- M.S.
"No, you
can't have that stuff, it's junk"
The Economist
Nov 5th 2010